Cisco Certified Network Associate (ccna) Practice Lab
Download 1.21 Mb.
|
Learning OutcomesAfter completing this exercise, you will be able to: Describe the Purpose and Function of an Access Point Your DevicesThis exercise contains supporting materials for Cisco. Access PointsWireless communication uses radio frequency (RF) signals, where many factors can affect the data transport. The most important thing that you need to keep in mind when designing a wireless network is that you need to have optical visibility between devices and from users to devices. Wireless devices work either on a 2.4 GHz or 5 GHz frequency band, and each provides a different range of bandwidth. 2.4 GHz is more useful for wider coverage, and 5 GHz provides higher transport speed. Within these bands, you have smaller bands called channels that provide a medium through which you send and receive data. 2.4 GHz band has 11 channels, and the 5 GHz band has 45 channels. For two wireless devices to communicate, they need to be on the same channel. Wireless networks are complex and involve several protocols and technologies working together to provide a stable connection to the network. You need to take special care about security, which in wireless communication is mostly about identifying endpoints, identifying users, and protecting data transferred over wireless links. First, you need to authenticate users, and this can be done using different methods. For example, you can use a text string configured on the Access Point, or you can use corporate credentials by having the user provide username and password. To protect data transfer, encryption is used at the transmitter side, and a receiver decrypts that data. For example, you can use a Wi-Fi Protected Access (WPA) or WPA2 protocol. Cisco offers a wide range of access points models divided for indoor and outdoor purposes. Indoor Access Points Indoor Access Points allows a Wi-Fi compliant device to connect to a wired network. Cisco’s family of enterprise access points support 802.11ac Wave 2 and the latest Wi-Fi technology. Some of the models are: Download 1.21 Mb. Share with your friends:
|